CN101624201B - Method for waste heat of gas suspension clacining aluminum oxide heating flat disk washing water - Google Patents
Method for waste heat of gas suspension clacining aluminum oxide heating flat disk washing water Download PDFInfo
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- CN101624201B CN101624201B CN200910114304XA CN200910114304A CN101624201B CN 101624201 B CN101624201 B CN 101624201B CN 200910114304X A CN200910114304X A CN 200910114304XA CN 200910114304 A CN200910114304 A CN 200910114304A CN 101624201 B CN101624201 B CN 101624201B
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- aluminum oxide
- waste heat
- clacining
- water
- flat disk
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention provides a method for waste heat of gas suspension clacining aluminum oxide heating flat disk washing water, comprising the following steps: condensed water with second evaporation is led to a gas suspension calciner fluidized bed to carry out heat exchange with aluminum oxide powders; and after the waste heat of aluminum oxide is fully absorbed, the condensed water flows back to a hot water groove to be used as flat disk aluminum hydroxide washing water. The invention fully recovers and utilizes the waste heat of clacining the aluminum oxide, lowers unit steam consumption generated by the aluminum oxide, provides a new method for energy saving and consumption reduction for aluminum oxide production, and has little investment, simple practice and remarkable economic benefit.
Description
Technical field
The present invention relates to a kind of process for making alumina, especially a kind of technology of recycling roasting oxidation aluminium waste heat.
Background technology
Aluminium hydroxide is sent into the gas suspending calcining furnace roasting and is become qualified aluminum oxide by Shen gram feeding scale, screw feeder, enters fluidized-bed again and passes through heat exchanger cooling with recirculated water, makes the aluminum oxide powder drop temperature below 80 ℃.Behind the recirculated water cooling roasting oxidation aluminium, the heat that recirculated water is taken away is discharged in the air through cooling tower, and recirculated water waste of manpower in operational process, material resources and electric energy have caused energy dissipation simultaneously.
Summary of the invention
The present invention proposes to recycle gas suspending calcining furnace roasting oxidation aluminium waste heat, to the heating of aluminium hydroxide wash water, reaches the purpose of save energy.
Technical scheme is: will evaporate that time condensation water is guided to the gas suspending calcining furnace fluidized-bed and aluminum oxide powder carries out heat exchange, and after fully absorbing the aluminum oxide waste heat, flow back to hot water tank again and use as square position aluminium hydroxide wash water.
Positively effect of the present invention and benefit:
Fully recycle the waste heat of roasting oxidation aluminium, reduced the steam mono-consumption of alumina producing, proposed new method, remarkable in economical benefits for alumina producing is energy-saving and cost-reducing.
The present invention invests little, implements simple.According to my company's Process configuration situation, only increased section of tubing, valve during the invention process, invest about 30,000 yuans.
Economic benefit: by producing 1600000 tons of aluminum oxide per year, aluminium hydroxide wash water 0.35t/T.AH, the wash water temperature rises to 85 ℃ of calculating from 62 ℃, can save about 40,000 tons of steam every year, according to my company's steam cost is that 130 yuan/T calculates, and can save about about 5,200,000 yuan of Renminbi every year.
Description of drawings
Elaborate below in conjunction with accompanying drawing.
Fig. 1 is gas suspending calcining furnace aluminum oxide and aluminium hydroxide wash water heat exchange synoptic diagram.
Respectively be labeled as: 1-evaporation time condensation water; 2-water of condensation water inlet pipe thermometer; 3-fluidized bed cooler group; 4-is to other stoving oven fluidized-bed spare interface; Thermometer on the 5-condensate ruturn pipe; 6-roasting oxidation aluminium opening for feed; The 7-condensate ruturn pipe; 8-roasting oxidation aluminium discharge port; 9 wash water grooves.
Annotate: water of condensation water inlet pipe and rising pipe caliber all adopt the common weldless steel tube in DN100 * 6, and valve is DN100, nominal pressure is the gate valve of 16kg.
Embodiment
The wash water of square position aluminium hydroxide does not re-use the live steam heating, but before entering the hot water tank of former heating, receive gas suspending calcining furnace fluidized-bed cooling process and aluminum oxide powder carries out heat exchange by a common weldless steel tube, after fully absorbing the aluminum oxide waste heat, the wash water temperature reaches production requirement, flows back to hot water tank again and uses as square position aluminium hydroxide wash water.
Shown in " gas suspending calcining furnace aluminum oxide and aluminium hydroxide wash water heat exchange synoptic diagram ": will evaporate time condensation water 1 causes stoving oven fluidized bed cooler group 3 through pipeline water-in, water outlet after the heat exchange enters in the wash water groove 9, as the wash water of square position aluminium hydroxide.The flow direction of water of condensation in fluidized-bed flows to opposite with aluminum oxide powder.This programme has been reserved the interface 4 of other stoving oven.Thermometer 2,5 all is installed on the inlet tube and outlet tube.Because the little and inflow temperature height of the aluminium hydroxide leaching requirement that needs is in order to guarantee roasting oxidation aluminium drop temperature, so the logical water coolant of an other fluidized-bed of stoving oven guarantees that the aluminum oxide powder drop temperature is below 80 ℃.
I have 2 fluidized-beds by every stoving oven of company, and every fluidized-bed has 4 placed in-line water coolers, and the area of every water cooler is 50.62m
2
During actual production,, about 230 ℃ finished product aluminum oxide powder drop temperature is reduced to below 80 ℃, then be raised to more than 85 ℃ after the heat exchange of evaporation time condensation water from about 62 ℃ by regulating cooling water inflow and alumina amount.
Claims (1)
1. the method for a waste heat of gas suspension clacining aluminum oxide heating flat disk washing water, it is characterized in that: will evaporate that time condensation water is guided to the gas suspending calcining furnace fluidized-bed and aluminum oxide powder carries out heat exchange, after fully absorbing the aluminum oxide waste heat, flow back to hot water tank again and use as square position aluminium hydroxide wash water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910114304XA CN101624201B (en) | 2009-08-12 | 2009-08-12 | Method for waste heat of gas suspension clacining aluminum oxide heating flat disk washing water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910114304XA CN101624201B (en) | 2009-08-12 | 2009-08-12 | Method for waste heat of gas suspension clacining aluminum oxide heating flat disk washing water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101624201A CN101624201A (en) | 2010-01-13 |
| CN101624201B true CN101624201B (en) | 2011-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910114304XA Active CN101624201B (en) | 2009-08-12 | 2009-08-12 | Method for waste heat of gas suspension clacining aluminum oxide heating flat disk washing water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101624201B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435076A (en) * | 2010-09-29 | 2012-05-02 | 中国铝业股份有限公司 | Waste heat utilization method for fluidized-bed roaster in alumina production |
| CN102849766A (en) * | 2011-06-28 | 2013-01-02 | 沈阳铝镁设计研究院有限公司 | Method for waste heat recovery and utilization of roasted alumina |
| CN103723750A (en) * | 2012-10-15 | 2014-04-16 | 沈阳铝镁设计研究院有限公司 | Circulating cooling method and apparatus used for roasting aluminum oxide |
| CN109520332A (en) * | 2017-09-20 | 2019-03-26 | 沈阳铝镁设计研究院有限公司 | Utilize the method and device of roasting oxidation aluminium waste-heat square position mother liquor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1204302A (en) * | 1995-11-14 | 1999-01-06 | 金属股份有限公司 | Process for producing aluminium oxide from aluminium hydroxide |
| CN101324408A (en) * | 2008-08-04 | 2008-12-17 | 中国铝业股份有限公司 | Flue gas waste heat recovery method of aluminum oxide gaseous state suspending calcining furnace |
-
2009
- 2009-08-12 CN CN200910114304XA patent/CN101624201B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1204302A (en) * | 1995-11-14 | 1999-01-06 | 金属股份有限公司 | Process for producing aluminium oxide from aluminium hydroxide |
| CN101324408A (en) * | 2008-08-04 | 2008-12-17 | 中国铝业股份有限公司 | Flue gas waste heat recovery method of aluminum oxide gaseous state suspending calcining furnace |
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| Publication number | Publication date |
|---|---|
| CN101624201A (en) | 2010-01-13 |
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